The symptoms of poor eyesight are also known as vision loss, and it is necessary to distinguish the causes of such symptoms: 1. Short-term vision loss due to fatigue. For this kind of fatigue, the main thing is to improve the eye habits, reduce the prolonged close eye use, and close the eyes or take a rest after close eye work. 2. The eyes may have diseases that can cause vision loss. These diseases are mainly divided into two areas, the refractive interstitial diseases that can affect the eye, the most common include vitreous opacities, cataracts or some diseases on the cornea. Corneal diseases are commonly associated with inflammation and injury. Inflammation is treated with anti-infective or anti-inflammatory medications to restore the transparency of the cornea. Injuries are treated with medications that promote healing of the corneal epithelium, but if the injury is too deep, some corneal scarring may remain. The remaining category is retinal and optic nerve retinal disease present in the fundus of the eye, which mainly includes inflammatory and vascular. In the case of hemorrhagic disease, the hemorrhage needs to be relieved and then laser or medication is administered for the vascular condition, and surgery may also be required in severe cases. In the case of inflammatory retinal diseases, it is likely that most of the treatment will need to rely on hormones.